Mahabharata 12.210.17

ब्रह्मचर्यमहिंसा च शारीरं तप उच्यतेवाङ्मनोनियमः साम्यं मानसं तप उच्यते

brahmacaryamahiṃsā ca śārīraṃ tapa ucyatevāṅmanoniyamaḥ sāmyaṃ mānasaṃ tapa ucyate

Our plain-language meaning of this verse is waiting for scholar review.